code: def testExtensionRange(self):
      self.assertEqual(
          unittest_pb2.TestAllTypes.DESCRIPTOR.extension_ranges, []
      )
      self.assertEqual(
          unittest_pb2.TestAllExtensions.DESCRIPTOR.extension_ranges,
          [(1, MAX_EXTENSION)],
      )
      self.assertEqual(
          unittest_pb2.TestMultipleExtensionRanges.DESCRIPTOR.extension_ranges,
          [(42, 43), (4143, 4244), (65536, MAX_EXTENSION)],
      )
  
imports: import unittest
  from google.protobuf.internal import test_bad_identifiers_pb2
  from google.protobuf import unittest_custom_options_pb2
  from google.protobuf import unittest_import_pb2
  from google.protobuf import unittest_import_public_pb2
  from google.protobuf import unittest_mset_pb2
  from google.protobuf import unittest_pb2
  from google.protobuf import unittest_no_generic_services_pb2
  from google.protobuf import service
label_desc: Use image node_id 14 for calling the GeneratorTest obj's underlying member method code with example usage: obj.testExtensionRange() without return types